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                        <h1 class="file-heading">File: src&#x2F;pixi&#x2F;Stage.js</h1>

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    <pre class="code prettyprint linenums">
&#x2F;**
 * @author Mat Groves http:&#x2F;&#x2F;matgroves.com&#x2F; @Doormat23
 *&#x2F;

&#x2F;**
A Stage represents the root of the display tree. Everything connected to the stage is rendered
@class Stage
@extends DisplayObjectContainer
@constructor
@param backgroundColor {Number} the background color of the stage
@param interactive {Boolean} enable &#x2F; disable interaction (default is false)
*&#x2F;
PIXI.Stage = function(backgroundColor, interactive)
{
	
	PIXI.DisplayObjectContainer.call( this );
	this.worldTransform = PIXI.mat3.create()&#x2F;&#x2F;.&#x2F;&#x2F;identity();
	this.__childrenAdded = [];
	this.__childrenRemoved = [];
	this.childIndex = 0;
	this.stage= this;
	
	this.stage.hitArea = new PIXI.Rectangle(0,0,100000, 100000);
	
	&#x2F;&#x2F; interaction!
	this.interactive = !!interactive;
	this.interactionManager = new PIXI.InteractionManager(this);
	
	this.setBackgroundColor(backgroundColor);
}

&#x2F;&#x2F; constructor
PIXI.Stage.constructor = PIXI.Stage;

PIXI.Stage.prototype = Object.create( PIXI.DisplayObjectContainer.prototype );

&#x2F;**
@method updateTransform
@internal
*&#x2F;
PIXI.Stage.prototype.updateTransform = function()
{
	this.worldAlpha = 1;		
	
	for(var i=0,j=this.children.length; i&lt;j; i++)
	{
		this.children[i].updateTransform();	
	}
	
	if(this.dirty)
	{
		this.dirty = false;
		&#x2F;&#x2F; update interactive!
		this.interactionManager.dirty = true;
	}

	if(this.interactive)this.interactionManager.update();
}

&#x2F;**
 * @method setBackgroundColor
 * @param backgroundColor {Number}
 *&#x2F;
PIXI.Stage.prototype.setBackgroundColor = function(backgroundColor)
{
	this.backgroundColor = backgroundColor || 0x000000;
	this.backgroundColorSplit = HEXtoRGB(this.backgroundColor);
	this.backgroundColorString =  &quot;#&quot; + this.backgroundColor.toString(16);
}

&#x2F;**
 * This will return the point containing global coords of the mouse.
 * @method getMousePosition
 * @return {Point} The point containing the coords of the global InteractionData position.
 *&#x2F;
PIXI.Stage.prototype.getMousePosition = function()
{
	return this.interactionManager.mouse.global;
}

PIXI.Stage.prototype.__addChild = function(child)
{
	if(child.interactive)this.dirty = true;
	
	child.stage = this;
	
	if(child.children)
	{
		for (var i=0; i &lt; child.children.length; i++) 
		{
		  	this.__addChild(child.children[i]);
		};
	}
	
}


PIXI.Stage.prototype.__removeChild = function(child)
{
	if(child.interactive)this.dirty = true;
	
	this.__childrenRemoved.push(child);

	child.stage = undefined;
	
	if(child.children)
	{
		for(var i=0,j=child.children.length; i&lt;j; i++)
		{
		  	this.__removeChild(child.children[i])
		}
	}
}

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